TW201433182A - Mobile electronic device and audio playing means thereof - Google Patents

Abstract

The present invention provides a mobile electronic device and an audio playing means thereof. The audio playing means comprises a first audio player and a second audio player for playing a left channel audio and a right channel audio respectively; a first audio receiver and a second audio receiver for receiving a first echo of the left channel audio and a second echo of the right channel audio in real time respectively; and a control unit for compensating the left channel audio and the right channel audio according to the first echo and the second echo which are received, and controlling the first audio player and the second audio player to play a compensated left channel audio and a compensated right channel audio respectively, wherein the compensated left channel audio and the compensated right channel audio are able to offset the first echo and the second echo respectively. The audio playing means provided by the present invention compensates the left channel audio and the right channel audio by receiving the echoes generated by the left channel audio and the right channel audio. Therefore, the asymmetry between the left channel audio and the right channel audio is eliminated so that the listener experiences the good stereo effect.

Description

Sound playback method for mobile electronic devices and mobile electronic devices

The present invention relates generally to the field of electricity, and more particularly to a method of sound playback for a mobile electronic device and a mobile electronic device.

Mobile electronic devices (such as tablets, mobile phones, etc.) are widely used as sound playback means. Moreover, the listener desires that the sound played by the mobile electronic device has a stereo effect. The listener can experience the stereo effect by playing a left channel sound corresponding to the left ear and a right channel sound corresponding to the right ear, respectively, by using a pair of sound players.

However, the environment in which mobile electronic devices are used is often complicated, and the listener listens to the sound even while moving, thus causing significant asymmetry in the echoes produced by the left channel sound and the right channel sound. These asymmetrical echoes cause an imbalance between the left channel sound and the right channel sound, and further cause blurring of the stereo effect.

Therefore, there is a great need in the art to provide a mobile electronic device and a sound playing device for a mobile electronic device to solve the above problems in the prior art.

[brief]

In order to solve the above problems, a sound playing means of a mobile electronic device is provided according to an aspect of the present invention. The sound playing means of the mobile electronic device comprises a first sound player and a second sound player for playing the left channel sound and the right channel sound respectively; a first sound receiver and a second sound a receiver for receiving a first echo of the left channel sound and a second echo of the right channel sound, respectively; and a control unit for receiving the first echo and the second echo according to the received Compensating the left channel sound and the right channel sound, and controlling the first sound player and the second sound player to respectively play the compensated left channel sound and the compensated right channel sound, wherein the compensated left The channel sound and the compensated right channel sound are capable of canceling the first echo and the second echo, respectively.

Preferably, the control unit includes a first filter and a second filter. The first filter takes a sound signal having the same frequency as the left channel sound and takes a smaller amplitude smaller than the left channel sound as the first echo, and the second filter takes the sound signal having the same frequency as the right channel sound And taking a smaller amplitude smaller than the right channel sound as the second echo.

Preferably, the control unit includes a first inverter, a first synthesizer, and a first a second inverter and a second synthesizer, the first inverter receiving the first echo and generating a first inverted signal of the first echo, the first synthesizer and the left inverting The track sound is synthesized into a compensated left channel sound, the second inverter receives the second echo and generates a second inverted signal of the second echo, and the second synthesizer rotates the second inverted signal with the right The channel sound is synthesized into a compensated right channel sound.

Preferably, the control unit further includes an amplifier for the first inverter The first echo and the second echo are amplified before the second inverter receives the first echo and the second echo.

Preferably, the control unit further includes a phase adjustment means for adjusting the phases of the first echo and the second echo output by the amplifier.

Preferably, the first inverter comprises a first A/D (analog logarithmic bit) converter, a first digital signal processor and a first D/A (digital to analog) converter, the first An A/D converter is configured to convert the first echo into a digital signal, the first digital signal processor is configured to generate an inverted signal of the first echo that has been converted into a digital signal, and the first D/A The converter is operative to convert the inverted signal in the form of a digital signal to an analog signal to produce a first inverted signal.

Preferably, the second inverter comprises a second A/D converter, a second digital signal processor and a second D/A converter, wherein the second A/D converter is used for The second echo is converted into a digital signal, the second digital signal processor is configured to generate an inverted signal of the second echo that has been converted into a digital signal, and the second D/A converter is used to convert the digital signal into a digital signal. The inverted signal is converted to an analog signal to produce a second inverted signal.

Preferably, the control unit further includes a first post filter and a second post filter, the first post filter is configured to smooth the first inversion outputted by the first inverter The signal is sent to the first synthesizer, and the second post filter is used to smooth the second inverted signal output by the second inverter and send it to the second synthesizer.

Preferably, the first sound receiver and the second sound receiver also receive noise having a fixed frequency, and the control unit compensates the left channel sound and the right channel sound according to the noise.

Preferably, the first sound receiver and the second sound receiver are microphones.

According to another aspect of the present invention, a mobile electronic device is further provided. The mobile electronic device includes a sound playing device, and the sound playing device includes a first sound player and a second sound player symmetrically disposed on the mobile electronic device for respectively playing the left channel sound and the right Channel sound; a first sound receiver and a second sound receiver symmetrically disposed on the mobile electronic device for respectively receiving the first echo of the left channel sound and the second echo of the right channel sound And a control unit for compensating the left channel sound and the right channel sound according to the received first echo and second echo, and controlling the first sound player and the second sound player to play separately The compensated left channel sound and the compensated right channel sound, wherein the compensated left channel sound and the compensated right channel sound are capable of canceling the first echo and the second echo, respectively.

Preferably, the control unit comprises a first filter and a second filter, the first filter adopting a sound signal having the same frequency as the left channel sound and taking a smaller amplitude than the left channel sound as The first echo, and the second filter takes a sound signal having the same frequency as the right channel sound and takes a smaller amplitude smaller than the right channel sound as the second echo.

Preferably, the control unit includes a first inverter, a first synthesizer, a second inverter, and a second synthesizer. The first inverter receives the first echo and generates the first echo. a first inverted signal, the first synthesizer synthesizes the first inverted signal and the left channel sound into compensated left channel sound, and the second inverter receives the second echo and generates the second echo a second inverted signal, and the second synthesizer combines the second inverted signal with the right channel sound into a compensated right channel sound.

Preferably, the control unit further includes an amplifier for amplifying the first echo and the second echo before the first inverter and the second inverter receive the first echo and the second echo.

Preferably, the control unit further includes a phase adjustment means for adjusting the phases of the first echo and the second echo output by the amplifier.

Preferably, the first inverter comprises a first A/D converter, a first digital signal processor and a first D/A converter, wherein the first A/D converter is used for Converting an echo into a digital signal, the first digital signal processor is configured to generate an inverted signal of the first echo that has been converted into a digital signal, and the first D/A converter is used to convert the digital signal into a digital signal The inverted signal is converted to an analog signal to produce a first inverted signal.

Preferably, the second inverter comprises a second A/D converter, a second digital signal processor and a second D/A converter, wherein the second A/D converter is used for The second echo is converted into a digital signal, the second digital signal processor is configured to generate an inverted signal of the second echo that has been converted into a digital signal, and the second D/A converter is used to convert the digital signal into a digital signal. The inverted signal is converted to an analog signal to produce a second inverted signal.

Preferably, the control unit further includes a first post filter and a second post filter, the first post filter is configured to smooth the first inversion outputted by the first inverter The signal is sent to the first synthesizer, and the second post filter is used to smooth the second inverted signal output by the second inverter and send it to the second synthesizer.

Preferably, the first sound receiver and the second sound receiver further receive noise having a fixed frequency, and the control unit compensates the left channel sound and the right channel sound according to the noise.

Preferably, the first sound player and the second sound player are symmetrically disposed on the top and bottom of the mobile electronic device, respectively, and the first sound receiver and the second sound receiver are symmetrically disposed on The top and the bottom of the mobile electronic device.

The sound playing means provided by the present invention compensates the left channel sound and the right channel sound by receiving echoes generated by the left channel sound and the right channel sound to generate a compensated sound signal capable of canceling the echoes. . Therefore, the asymmetry between the left channel sound and the right channel sound is eliminated, so that the listener experiences a good stereo effect.

The inventive content of the present invention incorporates a series of simplified concepts that will be further described in further detail in the embodiments. The inventive content of the present invention does not imply that it intends to limit the basic features and necessary technical features of the technical solution to be protected, nor does it imply that it is intended to define a technical solution to be protected. The scope of protection of the approach.

Advantages and features of the present invention will be described in detail below with reference to the accompanying drawings.

100‧‧‧Mobile electronic devices

110A‧‧‧First Sound Player

110B‧‧‧Second sound player

120A‧‧‧First Sound Receiver

120B‧‧‧Second sound receiver

200‧‧‧Control means; control unit

210A‧‧‧First filter

210B‧‧‧Second filter

220A‧‧‧First Inverter

220B‧‧‧second inverter

221A‧‧‧First A/D (analog to digital) converter

221B‧‧‧Second A/D converter

222A‧‧‧first digital signal processor

222B‧‧‧second digital signal processor

223A‧‧‧First D/A (Digital to Analog) Converter

223B‧‧‧Second D/A converter

230A‧‧‧First Synthesizer

230B‧‧‧Second Synthesizer

300, 400, 500‧‧‧ control unit

310A‧‧‧First Amplifier

310B‧‧‧second amplifier

320A‧‧‧First phase adjustment means

320B‧‧‧Second phase adjustment means

510A‧‧‧First post filter

510B‧‧‧Second post filter

The following drawings of the present invention are intended to be illustrative of the embodiments of the invention, In the drawings: a first diagram is a schematic diagram of a mobile electronic device according to a specific embodiment of the present invention; and a second diagram is a schematic block diagram of a sound playing device according to an embodiment of the present invention; 3 is a schematic block diagram of a sound playing device according to a preferred embodiment of the present invention; and FIG. 4 is a schematic block diagram of a sound playing device according to still another preferred embodiment of the present invention; The fifth drawing is a schematic block diagram of a sound playing means according to still another preferred embodiment of the present invention.

Numerous specific details are set forth to provide a more complete understanding of the invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without one or more of these details. In other instances, certain technical features that are known in the art are not described to avoid obscuring the present invention.

According to an aspect of the present invention, a sound playing means of a mobile electronic device (hereinafter referred to as the sound playing means) is provided. In order to provide a general understanding of the sound playing means, the mobile electronic device will first be described along with the first figure. As shown in the first figure, the mobile electronic device 100 includes a first sound player 110A, a second sound player 110B, a first sound receiver 120A, a second sound receiver 120B, and a control unit. (not shown).

The first sound player 110A and the second sound player 110B are symmetrically disposed on the mobile electronic device 110 for playing the left channel sound and the right channel sound, respectively. The first sound player 110A and the second sound player 110B simultaneously play the left channel sound and the right channel sound. Allows the listener to experience two-channel stereo sound. The first sound player 110A and the second sound player 110B may be any means capable of playing sound, such as a speaker or the like. In summary, the first sound player 110A and the second sound player 110B are disposed in the housing of the mobile electronic device 100.

Similarly, the first sound receiver 120A and the second sound receiver 120B are Symmetrically disposed on the mobile electronic device 110, for receiving an echo of a left channel sound (hereinafter referred to as a first echo) and an echo of a right channel sound (hereinafter referred to as a second echo) and converting the sound signals into Electrical signal or other form of signal. The left channel sound and the right channel sound are simultaneously transmitted outward in the form of sound waves. The sound waves encounter obstacles and are reflected during the transmission process. At the same time, the obstacles have absorbed a portion of the energy such that the frequency of the first echo of the left channel sound and the frequency of the second echo of the right channel sound remain substantially unchanged, but with the original left channel sound and the original right channel sound. In comparison, the amplitude of the first echo of the left channel sound and the amplitude of the second echo of the right channel sound are greatly attenuated. The attenuation of the amplitudes is related to the transmission distances and the shape and material of the obstacles encountered during the transmission process.

As an example, the first sound receiver 120A and the second sound receiver 120B You can attach a microphone. A microphone used as an energy conversion device for converting a sound signal into an electrical signal is primarily a standard feature in existing mobile electronic devices. Thus, cost reduction can be achieved by taking such standard features of existing mobile electronic devices as part of the sound playback means provided by the present invention. The designer only considers the first sound receiver 120A and the second sound receiver 120B to be symmetrically disposed on the mobile electronic device 100. The first sound receiver 120A and the second sound receiver 120B may be one or more of an electrodynamic microphone, a condenser microphone, a piezoelectric microphone, an electromagnetic microphone, and a semiconductor microphone.

The first sound broadcast on the mobile electronic device 100 shown in the first figure The relative positions of the receiver 110A, the second sound player 110B, the first sound receiver 120A, and the second sound receiver 120B are merely exemplary and, therefore, should not be construed as limiting the invention.

Preferably, the first sound player 110A and the second sound player 110B are The first sound receiver 120A and the second sound receiver 120B are respectively symmetrically disposed on the top and bottom of the mobile electronic device 100, respectively. Typically, the mobile electronic device 100 plays a sound along with the corresponding video. therefore, When the mobile electronic device 100 is used to play a sound, the user places the mobile electronic device 100 as shown in the first figure. In this case, the first sound player 110A, the second sound player 110B, the first sound receiver 120A, and the second sound receiver 120B are disposed in the preferred manner mentioned above, so that the listener can experience good Stereo effect.

The control unit receives the first echo and the first received according to the first sound receiver 120A The second echo received by the second sound receiver 120B compensates for the left channel sound played by the first sound player 110A and the right channel sound played by the second sound player 110B, and controls the first sound player 110A and the The second sound player 110B plays the compensated left channel sound and the compensated right channel sound, respectively. Compensating the left channel sound with the first echo to generate a first inverted signal having the same amplitude as the first echo and an inverse phase for the first echo according to the first echo, and generating the first echo according to the interference principle of the sound wave The first inverted signals interfere with each other to achieve cancellation of the first echo. Similarly, the second echo compensation right channel sound is used to generate a second inverted signal having the same amplitude as the second echo and an inverse phase for the second echo according to the second echo, and the first phase is generated according to the interference principle of the sound wave. The two echoes interfere with each other of the second inverted signal to achieve cancellation of the second echo.

It should be noted that the echo is a natural phenomenon and cannot be avoided during the playback of the sound signal. It will generate an echo of the sound signal immediately. The sound playing means provided by the present invention does not want to eliminate the echoes (including the first echo and the second echo), but compensates the left sound played by the first sound player 110A through the inverted signals that generate the echoes. The track sound and the right channel sound played by the second sound player 110B enable the compensated left channel sound and the compensated right channel sound to cancel the first echo and the second echo, respectively. Thus the first echo and the second echo do not affect the hearing of the listener. The echo signals played by the sound players (including the first sound player 110A and the second sound player 110B) will immediately generate the echoes, so if the processing power and processing speed are insufficient, then The inverted signal will not only cancel the echo but will be the other source of noise.

The following is a sound accompanying the second figure in accordance with a specific embodiment of the present invention Description of the means of playback. In the text, only the control means 200 included in the sound playing means will be mainly explained in detail.

Generally, the first sound receiver 120A and the second sound receiver 120B receive All types of sound signals in the environment include the sound signals played by the first sound player 110A and the second sound player 110B, the echo signals of the sound signals, the background sound signals, and the like. The control unit needs to select the first echo of the left channel sound played by the first sound player 110A and the second echo of the right channel sound played by the second sound player 110B from all types of such sound signals. Therefore, preferably, the control unit 200 can include a first filter 210A and a second filter 210B. The first filter 210A takes a sound signal having the same frequency as the left channel sound and takes a smaller amplitude than the left channel sound as the first echo. The second filter 210B takes a sound signal having the same frequency as the right channel sound and takes a smaller amplitude than the right channel sound as the second echo. Alternatively, control unit 200 may employ other means to select the first echo and the second echo from all types of such acoustic signals. The preferred embodiment can quickly and efficiently select the left channel sound and the right channel sound by transmitting the relationship between the echo signals and the original sound signals through the first filter 210A and the second filter 210B. The echo signals.

As an example, the control unit 200 includes a first inverter 220A and a first Synthesizer 230A. The first inverter 220A receives the first echo and generates a first inverted signal having the same frequency as the first echo and an inverted phase for the first echo. The first inverter 220A transmits the first inverted signal to the first synthesizer 230A. The first synthesizer 230A synthesizes the first inverted signal with the left channel sound to produce a compensated left channel sound. Similarly, the control unit 200 includes a second inverter 220B and a second synthesizer 230B. The second inverter 220B receives the second echo and generates a second inverted signal having the same frequency as the second echo and an inverted phase for the second echo. The second inverter 220B transmits the second inverted signal to the second synthesizer 230B. The second synthesizer 230B synthesizes the second inverted signal with the right channel sound to produce a compensated right channel sound. The invention is not limited to the specific embodiments mentioned above. Control unit 200 can include other means to obtain a first inverted signal and a second inverted signal.

The third figure shows a sound player in accordance with a preferred embodiment of the present invention. segment. As shown in the third figure, the control unit 300 further includes a first amplifier 310A and a second amplifier 310B. The first amplifier 310A and the second amplifier 310B are located in front of the first inverter 220A and the second inverter 220B, respectively. The first amplifier 310A and the second amplifier 310B are configured to receive the first echo and the second echo at the first inverter 220A and the second inverter 220B, respectively. The first echo and the second echo are previously amplified to facilitate performing all types of subsequent calculations for the first echo and the second echo. The same components included in the preferred embodiment of the specific embodiment as mentioned above are not described in detail because of the same or similar functions.

Left channel sound and right sound after steps of reflection, reception, selection and amplification The phases of the track sound are substantially different from the phases of the original sound signals. The phases of the echo signals and the corresponding sound signals are preferably matched before the signals enter the inverter 220A and the inverter 220B, such that the inverted signals of the echo signals are included (including The compensated sound signals obtained by combining the first inverted signal and the second inverted signal with the corresponding sound signal can effectively cancel the echo signals. Preferably, the control unit 200 further includes a first phase adjustment means 320A and a second phase adjustment means 320B. The first phase adjustment means 320A and the second phase adjustment means 320B are in the signal transmission path behind the first amplifier 310A and the second amplifier 310B, respectively, for adjusting the first echo and the second amplifier output by the first amplifier 310A. The phases of the second echo output by 310B.

The fourth figure shows a sound broadcast according to still another preferred embodiment of the present invention. Put the means. As shown in the fourth figure, the first inverter 220A includes a first A/D converter 221A, a first digital signal processor 222A, and a first D/A converter 223A. The first A/D converter 221A converts the first echo received by the first inverter 220A into a digital signal and transmits it to the first digital signal processor 222A. The first digital signal processor 222A generates an inverted signal of the first echo that has been converted into a digital signal and transmits it to the first D/A converter 223A. The first D/A converter 223A converts the inverted signal in the form of a digital signal into an analog signal to generate a first inverted signal. The processing power and processing speed of the control unit 400 can be improved by converting the analog signal into a digital signal and performing an inverse calculation. As mentioned above, this is very important for the cancellation of these echoes.

Preferably, as shown in the fourth figure, the second inverter 220B includes a first A second A/D converter 221B, a second digital signal processor 222B and a second D/A converter 223B. The second A/D converter 221B converts the second echo received by the second inverter 220B into a digital signal and transmits it to the second digital signal processor 222B. The second digital signal processor 222B generates an inverted signal of the second echo that has been converted into a digital signal and transmits it to the second D/A converter 223B. The second D/A converter 223B will form the inverted signal in the form of a digital signal Converted to an analog signal to produce a second inverted signal. The processing power and processing speed of the control unit 400 can be improved by converting the analog signal into a digital signal and performing an inverse calculation. As mentioned above, this is very important for the cancellation of these echoes.

The first inverter 220A and the second inverter 220B may have the same structure or different structures as long as the functions of both are enabled and the control unit 200 is provided with sufficient processing power and processing speed.

The fifth figure shows a sound playing means according to still another preferred embodiment. As shown in the fifth figure, the control unit 400 further includes a first post filter 510A and a second post filter 510B. The first post filter 510A is disposed between the first inverter 220A and the first synthesizer 230A for smoothing the first inverted signal output by the first inverter 220A and transmitting it to the first Synthesizer 230A. The second post filter 510B is disposed between the second inverter 220B and the second synthesizer 230B for smoothing the second inverted signal output by the second inverter 220B and transmitting it to the second Synthesizer 230B. The smoothed inverted signals are sent to the synthesizers (including the first synthesizer 230A and the second synthesizer 230B) such that the compensated acoustic signals synthesized by the synthesizers can effectively cancel the Echo and improve stereo sound.

As mentioned above, the first sound receiver 120A and the second sound receiver 120B will receive background noise. Typically, background noise has a fixed frequency. Preferably, the control unit 200 can further compensate the left channel sound and the right channel sound according to the noise. The method of compensating for the noise by the control unit 200 may be the same as the method mentioned above for compensating the echoes. The method can include generating a noise inversion signal having the same frequency as the fixed frequency noise and an inverse phase for the fixed frequency noise, and causing the noise inversion signal to be played with the left sound played by the first sound player 110A The track sound is synthesized with the right channel sound played by the second sound player 110B to generate a left channel sound and a right channel sound capable of compensating for fixed frequency noise. In this way, the stereo effect is improved. The means for obtaining the inverted signal of the noise and the means for synthesizing the sound signal for compensating for the noise may be the same as the means mentioned above for compensating the echo. Moreover, the two can be integrated or exist independently of each other.

According to another aspect of the present invention, a mobile electronic device is further provided. Referring to the first figure, the mobile electronic device 100 includes any of the types of sound players mentioned above. segment. The sound playing means comprises a first sound player 110A and a second sound player 110B symmetrically disposed on the mobile electronic device; a first sound receiver 120A and a second sound receiver 120B symmetrically disposed on the mobile Electronic device; and a control unit (not shown). Each component included in the sound playing means can be referred to the above description. It is not described in detail in Yu Wen.

The sound playing means provided by the present invention compensates the left channel sound and the right channel sound by receiving the echoes generated by the left channel sound and the right channel sound to generate the equals capable of canceling the echoes The signal of compensation. Therefore, the asymmetry between the left channel sound and the right channel sound is eliminated, so that the listener experiences a good stereo effect.

The invention has been described by the specific embodiments mentioned above. However, it is to be understood that the foregoing specific embodiments are intended for purposes of illustration and description, and are not intended to limit the scope of the particular embodiments. Further, those skilled in the art should understand that the present invention is not limited to the specific embodiments described above, and various modifications and adaptations described in accordance with the present invention can be made within the scope and spirit of the invention. The scope of protection of the present invention is further defined by the scope of the following claims and their equivalents.

100‧‧‧Mobile electronic devices

110A‧‧‧First Sound Player

110B‧‧‧Second sound player

120A‧‧‧First Sound Receiver

120B‧‧‧Second sound receiver

Claims (20)

A sound playing device for a mobile electronic device, comprising: a first sound player and a second sound player for respectively playing a left channel sound and a right channel sound; a first sound receiver and a second sound receiver for receiving a first echo of the left channel sound and a second echo of the right channel sound, respectively; and a control unit for receiving the first according to the first sound The echo and the second echo compensate the left channel sound and the right channel sound, and control the first sound player and the second sound player to respectively play a compensated left channel sound and a compensated right channel sound, Wherein the compensated left channel sound and the compensated right channel sound are capable of canceling the first echo and the second echo, respectively. The sound playing device of claim 1, wherein the control unit comprises a first filter and a second filter, wherein the first filter takes a sound signal having the same frequency as the left channel sound and takes less than a small amplitude of the left channel sound as a first echo, the second filter taking a sound signal having the same frequency as the right channel sound and taking a smaller amplitude smaller than the right channel sound as the second echo . The sound playing device of claim 1, wherein the control unit comprises a first inverter, a first synthesizer, a second inverter and a second synthesizer, the first inverter receiving a first echo and generating a first inverted signal of the first echo, the first synthesizer synthesizing the first inverted signal and the left channel sound into compensated left channel sound, the second inverter Receiving a second echo and generating a second inverted signal of the second echo, and the second synthesizer synthesizes the second inverted signal and the right channel sound into compensated right channel sound. The sound playing means of claim 3, wherein the control unit further comprises an amplifier for amplifying the first before the first inverter and the second inverter receive the first echo and the second echo Echo and the second echo. The sound playing device of claim 4, wherein the control unit further comprises a phase adjusting means for adjusting a phase of the first echo and the second echo output by the amplifier. For example, the sound playback means of claim 3, wherein the first inverter comprises a first An A/D (analog logarithmic) converter, a first digital signal processor, and a first D/A (digital to analog) converter for converting the first echo Forming a digital signal, the first digital signal processor is configured to generate an inverted signal of the first echo that has been converted into a digital signal, and the first D/A converter is configured to use the digital signal in the form of a digital signal The inverted signal is converted to an analog signal to produce a first inverted signal. The sound playing device of claim 3, wherein the second inverter comprises a second A/D converter, a second digital signal processor and a second D/A converter, the second A The /D converter is configured to convert the second echo into a digital signal, the second digital signal processor is configured to generate an inverted signal of the second echo that has been converted into a digital signal, and the second D/A The converter is operative to convert the inverted signal in the form of a digital signal into an analog signal to produce a second inverted signal. The sound playback device of claim 3, wherein the control unit further comprises a first post filter and a second post filter, wherein the first post filter is used to smooth the first inversion The first inverted signal output by the device and sent to the first synthesizer, and the second post filter is used to smooth the second inverted signal output by the second inverter and Send to the second synthesizer. The sound playing device of claim 1, wherein the first sound receiver and the second sound receiver also receive a noise having a fixed frequency, and the control unit compensates the left channel sound according to the noise. And right channel sound. The sound playing means of claim 1, wherein the first sound receiver and the second sound receiver are microphones. A mobile electronic device includes a sound playing means, the sound playing means comprising: a first sound player and a second sound player symmetrically disposed on the mobile electronic device for respectively playing a left channel a sound and a right channel sound; a first sound receiver and a second sound receiver symmetrically disposed on the mobile electronic device for respectively receiving a first echo and the right of the left channel sound a second echo of the channel sound; and a control unit for compensating the left channel sound and the right channel sound according to the received first echo and the second echo, and controlling the first sound player and The second sound playback The compensated left channel sound and the compensated right channel sound are respectively played, wherein the compensated left channel sound and the compensated right channel sound can cancel the first echo and the second echo, respectively. The mobile electronic device of claim 11, wherein the control unit comprises a first filter and a second filter, wherein the first filter takes a sound signal having the same frequency as the left channel sound and takes a smaller amplitude smaller than the left channel sound as the first echo, and the second filter takes a sound signal having the same frequency as the right channel sound and takes a smaller amplitude than the right channel sound as the first Two echoes. The mobile electronic device of claim 11, wherein the control unit comprises a first inverter, a first synthesizer, a second inverter and a second synthesizer, the first inverter Receiving a first echo and generating a first inverted signal of the first echo, the first synthesizer synthesizing the first inverted signal and the left channel sound into a compensated left channel sound, the second inversion The receiver receives a second echo and generates a second inverted signal of the second echo, and the second synthesizer combines the second inverted signal with the right channel sound into a compensated right channel sound. The mobile electronic device of claim 13, wherein the control unit further comprises an amplifier for amplifying the first echo and the second echo before the first inverter and the second inverter receive the first echo and the second echo An echo and the second echo. The mobile electronic device of claim 14, wherein the control unit further comprises a phase adjustment means for adjusting a phase of the first echo and the second echo output by the amplifier. The mobile electronic device of claim 13, wherein the first inverter comprises a first A/D converter, a first digital signal processor and a first D/A converter, the first The A/D converter is configured to convert the first echo into a digital signal, the first digital signal processor is configured to generate an inverted signal of the first echo that has been converted into a digital signal, and the first D/ The A converter is for converting the inverted signal in the form of a digital signal into an analog signal to produce a first inverted signal. The mobile electronic device of claim 13, wherein the second inverter comprises a second A/D converter, a second digital signal processor and a second D/A converter. a second A/D converter for converting a second echo into a digital signal, the second digital signal processor for generating an inverted signal of the second echo that has been converted into a digital signal, and the second D The /A converter is for converting the inverted signal in the form of a digital signal into an analog signal to produce a second inverted signal. The mobile electronic device of claim 13, wherein the control unit further comprises a first post filter and a second post filter, wherein the first post filter is used to smooth the first anti- The first inverted signal output by the phase device and sent to the first synthesizer, and the second post filter is used to smooth the second inverted signal output by the second inverter and It is sent to the second synthesizer. The mobile electronic device of claim 11, wherein the first sound receiver and the second sound receiver further receive a noise having a fixed frequency, and the control unit compensates the left channel according to the noise Sound and right channel sound. The mobile electronic device of claim 11, wherein the first sound player and the second sound player are symmetrically disposed on a top and a bottom of the mobile electronic device, respectively, and the first sound is received. The second sound receiver and the second sound receiver are symmetrically disposed on the top and the bottom of the mobile electronic device.